On television and in the movies, one shot from an handgun drops the bad guy, or a shot throws the bad guy across the room. It would seem the handgun is the ultimate self-defense weapon. However, these are special effects, not real life. Any hand fired projectile that strikes a person with enough force to throw the person backward, will also throw they person who fired it backward (equal and opposite reaction). When it comes to self-defense, you want to stop the attacker from pursing the attack. While this may involve killing the attacker, it may only involve incapacitating the attacker. Thus handguns should be rated according to their stopping power not their killing power. Handgun Stopping Power -The Definitive Study, by Marshall and Sanow, list some facts about handgun stopping power:

• Knocked down does not mean knocked out.

• There is no predictable and reliable medical reason for a person to fall and become "instantly incapacitated" from a gun shot with the exception of a wound to the brain stem.

• Sometimes the bullet will produce no visible effect at all. It may take 30-90 seconds or even longer for the person to fall.

• Even if shot placement is good and vital tissue is damaged, it is reasonable to expect the person to remain mobile, active and hostile for 10 to 5 seconds after the shot.

• Pain inflicted on a person, even extreme pain, should never be confused with incapacitation. Neither does the simple act of falling to the ground upon bullet impact constitute incapacitation.

• Bullet effectiveness can be extremely slow even when the bullet perforates the heart, collapses both lungs or cuts open the aorta. Imagine how slow bullet effectiveness can be if vital organs like these escape its damage.

• First shot hit probability for law enforcement officers varies from 25 to 65 percent. Frequently the majority of shots will miss the target.